rs121913488

Positions:

• chr13-28018505-C-A
• chr13-28018505-C-G
• chr13-28018505-C-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP3_Strong PP5

The NM_004119.3(FLT3):​c.2503G>T​(p.Asp835Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D835A) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FLT3 NM_004119.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:4
• Conservation: PhyloP100: 7.91

Genes affected

FLT3 (HGNC:3765): (fms related receptor tyrosine kinase 3) This gene encodes a class III receptor tyrosine kinase that regulates hematopoiesis. This receptor is activated by binding of the fms-related tyrosine kinase 3 ligand to the extracellular domain, which induces homodimer formation in the plasma membrane leading to autophosphorylation of the receptor. The activated receptor kinase subsequently phosphorylates and activates multiple cytoplasmic effector molecules in pathways involved in apoptosis, proliferation, and differentiation of hematopoietic cells in bone marrow. Mutations that result in the constitutive activation of this receptor result in acute myeloid leukemia and acute lymphoblastic leukemia. [provided by RefSeq, Jan 2015]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 uncertain in NM_004119.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr13-28018504-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 375973.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.956
• PP5: Variant 13-28018505-C-A is Pathogenic according to our data. Variant chr13-28018505-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 16276.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLT3	NM_004119.3	c.2503G>T	p.Asp835Tyr	missense_variant	20/24	ENST00000241453.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLT3	ENST00000241453.12	c.2503G>T	p.Asp835Tyr	missense_variant	20/24	1	NM_004119.3	P1
FLT3	ENST00000380987.2	c.*415G>T		3_prime_UTR_variant, NMD_transcript_variant	21/25	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000312 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: no assertion criteria provided

Submissions by phenotype

Acute myeloid leukemia Pathogenic:3

Pathogenic, no assertion criteria provided	literature only	Database of Curated Mutations (DoCM)	Oct 02, 2014	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	May 01, 2004	- -
Pathogenic, no assertion criteria provided	clinical testing	Hematopathology, The University of Texas M.D. Anderson Cancer Center	Mar 30, 2018	- -

Acute lymphoid leukemia Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 01, 2004

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	D
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.084	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Uncertain	0.31	D
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-8.2	D
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.78		Gain of catalytic residue at S838 (P = 0);
MVP		0.95
MPC		0.63
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.93
gMVP		0.82

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs121913488; hg19: chr13-28592642; COSMIC: COSV54042116; COSMIC: COSV54042116;